89 results about "Mass transfer coefficient" patented technology

The invention provides a sewage treatment aeration control system and method based on multi-parameter collaborative optimization. The method comprises the following steps: acquiring multi-sensor data of COD (Chemical Oxygen Demand), BOD5 (Biochemical Oxygen Demand), DO (Dissolved Oxygen Demand), ammonia nitrogen, ORP (Oxidation Reduction Potential), pH (Potential of Hydrogen), water inlet flow and sludge concentration of wastewater in an aeration tank by utilizing a multi-parameter sensor module; according to the dynamic correction oxygen mass transfer coefficient and the feedforward parameter, establishing a relationship between the water inlet load and aeration; calculating the air volume of an air blower and the fine adjustment value of the opening degree of a butterfly valve through a PID control algorithm and feedback parameters, and correcting the aeration quantity to obtain a total air volume target value; and adjusting the opening degree and the rotating speed of a guide vane of the air blower according to the self-adaptive PID control parameters and the corrected total air volume target value by utilizing a self-adaptive PID controller, and adjusting the opening degree of a butterfly valve according to a gradient butterfly valve adjusting strategy. The output of the air blower is optimized by adopting self-adaptive PID, and the opening degree of the butterfly valve of each biological tank is dynamically adjusted through a gradient valve adjusting strategy, so that the accurate control of the aeration rate is realized; the sewage treatment effect is ensured.

The invention discloses a particle mass transfer characteristic prediction method and system based on a machine learning algorithm, and relates to the technical field of particle movement in a multiphase flow system. The method comprises the following steps: constructing a bidirectional coupling numerical model, simulating a particle stirring process of a stirring tank by using the bidirectional coupling numerical model, and analyzing particle mass transfer characteristics and motion characteristics; constructing a machine learning model set, determining a neural network model, training the neural network model, and predicting the behavior of particles in the stirring tank by using the trained neural network to obtain a predicted value of the mass transfer coefficient of the stirring tank; and carrying out combined analysis on the analysis result of the interaction force between the particles and the fluid and the predicted value of the mass transfer coefficient of the stirring tank to obtain an inter-phase mass transfer rule in the stirring tank. The problems that the strong nonlinearity of the stirring tank is difficult to analyze, the mixing efficiency in the solid-liquid suspension process is low, the real-time performance based on dynamic model regulation and control is poor, and industrialization cannot be completely adapted are solved.

The invention provides a tobacco leaf drying kinetic model-based baking process parameter optimization method, and belongs to the technical field of electrical digital data process.The tobacco leaf drying kinetic model-based baking process parameter optimization method comprises the following steps of: firstly, establishing a tobacco leaf drying differential equation model and a curing barn computational fluid mechanics model; temperature and humidity field distribution is obtained through simulation analysis; calculating a tobacco leaf surface heat and mass transfer coefficient, and establishing a moisture migration prediction function; a moisture transfer optimization function is introduced to perform parameter preliminary screening, and a pre-trained quality evaluation neural network model is adopted to evaluate a parameter scheme; respectively optimizing three stages of a yellowing stage, a color fixing stage and a stem drying stage to form a parameter set; and finally, an optimal parameter combination is searched by applying a genetic algorithm, an optimization target is a comprehensive score of tobacco leaf quality consistency and energy consumption, real-time optimization of parameters in the baking process is realized, and the technical problem that tobacco leaf baking process parameters are difficult to accurately optimize aiming at different tobacco leaf characteristics in the prior art is solved.

The invention relates to an aerosol multi-parameter dynamic monitoring system and a mass transfer source item correction method based on experiment-simulation fusion, and the aerosol multi-parameter dynamic monitoring system comprises a condensation nucleus control device, a flue gas simulation device and a multi-measuring-point filler type absorption tower, the condensation nucleus control device is used for generating monodisperse aerosol condensation nucleuses with single particle size; the flue gas simulation device is used for generating simulation flue gas with controllable components and flow based on the monodisperse aerosol condensation nucleus; the multi-measuring-point packing type absorption tower is provided with at least three aerosol sampling measuring points at intervals along the height direction of the tower body; the particle information acquisition system comprises a constant-speed sampling gun and an ELPI measuring instrument. Compared with the prior art, the method has the advantages that the mass transfer coefficient of the secondary aerosol can be accurately obtained, and the dynamic correction of the source item in numerical simulation is realized, so that the simulation precision and engineering adaptability of the carbon capture system in the aspects of absorbent loss and aerosol escape control are improved.

A carbonate rock rough slit acid liquid mass transfer coefficient calculation method comprises the following steps: 1) setting conditions based on carbonate rock rough morphology, and constructing a diffusion boundary layer thickness equation under the rough morphology conditions; and 2) solving to obtain the thickness of the diffusion boundary layer, and calculating the mass transfer coefficient according to the relational expression between the thickness of the diffusion boundary layer and the mass transfer coefficient. The carbonate rock rough slit acid liquid mass transfer coefficient calculation method is provided by considering rough morphology influence, no slippage of the acid liquid and filtration loss, and compared with a plane assumption condition in the prior art, the method is more consistent with a real condition, and the coincidence degree with an experimental test result is higher.

The invention belongs to the field of soil environment pollution simulation and prediction, and provides a prediction method based on a two-point chemical unbalanced model, which is used for quantitatively evaluating the effect of regulating and controlling the migration behavior of p-nitrophenol in acid red soil by straw stalk biochar. According to the method, a biochar-red soil composite medium system is constructed, a soil column leaching experiment is carried out to obtain penetration curve data, a two-point chemical unbalance model in CXTFIT software is utilized to carry out parameter inversion, and key parameters such as a retardation factor, a two-region distribution coefficient, a mass transfer coefficient and a liquid phase degradation coefficient are accurately identified. Model verification shows that the goodness of fit is high, and a parameter change rule reveals the inherent mechanism of enhancing the pollutant retention capacity, changing the proportion of fast and slow adsorption sites and influencing mass transfer kinetics by the biochar. Based on the verified model, the long-term migration behavior and pollution risk of p-nitrophenol under different environmental conditions can be simulated, and a scientific basis is provided for groundwater pollution control and remediation strategy optimization.

The invention discloses a non-isothermal three-dimensional fractured core acidification numerical simulation method which comprises the following steps: S1, constructing a fractured core acidification numerical simulation physical model, dividing grids and endowing physical parameters; s2, calculating a fluid channeling coefficient; s3, solving a matrix and fracture pressure control equation, calculating seepage velocity and molar reaction heat, and recording current injection pressure; s4, solving a temperature control equation of the matrix, the fracture acid liquor and the rock, and calculating an effective diffusion coefficient, an acid liquor reaction rate constant and a mass transfer coefficient of the acid liquor; s5, solving a matrix and fracture acid liquor concentration control equation, and calculating the porosity, the pore throat radius, the permeability and the pore specific surface area of the current time step; and S6, judging whether the wormhole breaks through the rock core or not according to the injection pressure of the current time step, and obtaining a three-dimensional fractured rock core acidification numerical simulation result. According to the method, the three-dimensional fracture network and the non-isothermal field are deeply coupled, so that the precision of three-dimensional fractured core acidification numerical simulation is effectively improved.

The application discloses a novel advanced oxidation device which comprises an outer shell, a gas-liquid mixing chamber, an ultrasonic atomization disc, an air inlet hole, a water inlet hole, an ozone generator, a UV reaction disc tube and the like. Through ultrasonic catalysis and ultraviolet light catalysis, O3 is excited to generate a large amount of higher oxidizing ·OH, the mixing degree and turbulence intensity of ozone and sewage are improved, the mass transfer coefficient is increased, the mass transfer rate of ozone is improved, four-stage oxidation reactions are carried out in one reactor, and thus the ozone oxidation efficiency and effect are greatly improved, the pollutants in the wastewater are subjected to intensified oxidation, and thus the pollutants in the wastewater are degraded and removed.

The invention provides a rapid salinity and moisture determination method based on ultrasonic synergistic tumbling and pickling beef, which comprises the following steps: determining the salinity and moisture content in the ultrasonic synergistic tumbling and pickling beef by using a traditional physical and chemical analysis method, and obtaining corresponding predicted values by depending on a Fick second law diffusion model; correlation analysis is carried out on the measured value and the predicted value, and a diffusion model with good fitting is established; establishing a mathematical model between different ultrasonic powers of the ultrasonic synergistic tumbling equipment and mass transfer coefficients of salt and water, and enabling the ultrasonic powers to be in one-to-one correspondence with the mass transfer coefficients of salt and water; and combining the mathematical model with the diffusion model to quickly predict the content of salt and moisture in the beef pickled for the specified time under the specified ultrasonic power. The method disclosed by the invention is convenient and efficient, can provide support for rapid salt and moisture determination and process optimization for enterprises, is beneficial to popularization of an ultrasonic synergistic tumbling pickling technology in meat pickling, and meets the standardized production requirements of meat enterprises.

The application discloses a method for determining and distinguishing methane bubble flux and diffusion flux released by water bodies, and belongs to the field of methane flux determination in environmental water bodies, and comprises the following steps: determining the gas content of CH4 and N2O in the gas after the water body at a sampling point and surrounding atmosphere are shaken together and in the surrounding atmosphere of the water body at the sampling point, calculating the gas concentration of CH4 and N2O in the water body when the water body and the surrounding atmosphere are balanced and in the water body at the actual sampling point; determining the release flux of N2O and the total release flux of CH4 in the water body; calculating and comparing the gas mass transfer coefficients of diffusion type CH4 and total CH4; and calculating the CH4 diffusion and bubble flux. The application utilizes N2O to calculate the CH4 diffusion flux, realizes the rapid distinction of bubble type and diffusion type CH4 of water bodies, can collect and determine CH4 gas on a large scale in multiple environments, and solves the problems that CH4 determination is easily affected by the environment, time-consuming is relatively long, and it is difficult to capture occasional bubble events.

The application discloses a KR molten iron pretreatment endpoint sulfur content prediction method and system, comprising the following steps: obtaining the current KR molten iron pretreatment process molten iron ladle and stirring paddle structure parameters, molten iron weight and temperature parameters, and stirring paddle rotating speed and immersion depth parameters; obtaining the molten iron flow field change relationship formula according to the above obtained parameters; obtaining the current KR molten iron pretreatment process desulfurizer addition amount and desulfurizer diameter parameters; obtaining the desulfurization rate constant and mass transfer coefficient change relationship formula according to the above parameters and the molten iron flow field distribution data; determining the molten iron sulfur content change relationship formula with the KR molten iron pretreatment process parameters according to the desulfurization mass transfer coefficient, and determining the target time molten iron sulfur content. The technical scheme of the application can quantitatively predict the molten iron sulfur content change and the target time sulfur content size under different KR molten iron pretreatment process parameters.

The invention relates to the technical field of water treatment equipment multi-dimensional management, and discloses a water treatment equipment multi-dimensional management system based on an intelligent water affair cloud platform, and the system comprises the steps: calculating a dynamic alpha factor in real time through on-site off-gas detection data and a clear water reference mass transfer coefficient, and carrying out the real-time calculation of a dynamic alpha factor based on the monotonous relation between a bubble stagnation cap and mass transfer resistance; and performing inversion to obtain continuous parameters for quantifying the gas-liquid interface state. And further calculating the real-time sensitivity of the parameter to the air volume of the air blower, constructing an air volume and mass transfer nonlinear model, and solving the target air volume with the minimum energy consumption under the condition of meeting the technological oxygen demand constraint condition. And finally, the target air volume serves as a control instruction to be issued, meanwhile, interface recovery time is output according to the time change rate of the gas-liquid interface parameters, and dynamic energy saving and interface state collaborative management of the water treatment aeration system is achieved.

This utility model discloses a mixing agitator for a hydrogenation reactor, comprising a reactor body, multiple legs fixedly connected to the outer wall of the bottom of the reactor body, a top cover rotatably connected to the top of the reactor body, a feed pipe fixedly connected to the top of the top cover, a feed cover plate rotatably connected to the top of the feed pipe, a discharge pipe fixedly connected to the bottom of the reactor body, a discharge valve fixedly connected to the outer wall of the discharge pipe, a stirring mechanism installed on the inner wall of the reactor body, an aeration treatment mechanism installed on the top of the reactor body, and a foam elimination mechanism installed inside the reactor body. The air pump of this utility model's aeration treatment mechanism introduces hydrogen gas into the rotating shaft through the air inlet pipe, and sprays it out from the aeration pipe through the air guide hose. This, combined with the motor driving the rotating shaft and stirring rod of the stirring mechanism, causes the hydrogen gas to disperse into tiny bubbles. Simultaneously, a scraper removes material from the reactor wall, avoiding dead zones and improving the uniformity of the gas-liquid-solid three-phase mixing. The mass transfer coefficient is improved compared to traditional agitators.

The application discloses a kind of prediction method and system of cut tobacco outlet moisture, belong to cut tobacco outlet moisture prediction technical field.Its method includes: obtaining the outside boundary condition of cylinder of cut tobacco machine;The outside boundary condition of cylinder includes historical outside boundary condition and current outside boundary condition;The historical outside boundary condition is input into the fuzzy rule classification model constructed in advance, and current working condition stage is output;The current outside boundary condition and the inside boundary condition of cylinder mechanism model feedback are input into the heat and mass transfer regression algorithm model constructed in advance, and inside heat and mass transfer coefficient of cylinder is output;The current outside boundary condition, current working condition and inside heat and mass transfer coefficient of cylinder are input into the cylinder mechanism model constructed in advance, and the predicted value of cut tobacco machine outlet moisture is output.The application can consider the multiple limiting conditions existing in actual production, and organically combine cut tobacco machine mechanism model and data model, can predict cut tobacco machine outlet moisture under given condition.

The present application provides a kind of wastewater treatment aeration control system and method based on multi-parameter collaborative optimization, the present application utilizes multi-parameter sensor module to collect the multi-sensor data of COD, BOD5, DO, ammonia nitrogen, ORP, pH, influent flow, sludge concentration of wastewater in aeration tank;And according to the relationship between dynamic correction oxygen mass transfer coefficient and feedforward parameter, establish influent load and aeration;Through PID control algorithm and feedback parameter, the fine tuning value of blower air volume and butterfly valve opening is calculated, and the total air volume target value is obtained by correcting the aeration amount;Using adaptive PID controller, according to the adaptive PID control parameter and the total air volume target value corrected, the guide vane opening and speed of blower are adjusted, and according to the gradient butterfly valve adjustment strategy, the butterfly valve opening is adjusted.The present application uses adaptive PID to optimize blower output, and dynamically adjusts the butterfly valve opening of each biological tank through gradient valve adjustment strategy, realizes precise control of aeration amount;Ensure the effect of wastewater treatment.

The invention discloses a preparation method of Vocs integrated rotational flow emulsion, which comprises the following steps: S1, mixing deionized water with a chelating agent to prepare a continuous phase solution for removing metal ions; s2, compounding an anionic surfactant and a nonionic surfactant, dissolving in a mixed solvent of ethanol and acetone, and adding a functional additive to form a surfactant solution; s3, pre-dispersing the surfactant solution and the continuous phase solution to obtain a primary oil-in-water dispersion; the preparation method has the beneficial effects that the mass transfer efficiency is improved: the specific surface area of the nanoscale liquid drops (100-200nm) is improved by more than 3 times compared with that of the traditional emulsion, and the mass transfer coefficient is improved by 50-70% and the absorption equilibrium time is shortened by 60% in combination with low interfacial tension; metal ions are removed through chelating treatment, a pH buffer system is matched, the emulsion can be stably stored for 6 months under the conditions that the pH is 5-9 and the temperature is smaller than or equal to 60 DEG C, and the centrifugal layering rate (3000r / min, 30min) is smaller than 5%.

The invention relates to the technical field of sewage treatment equipment, in particular to a three-phase flow short-range anaerobic ammonium oxidation and anaerobic ammonium oxidation flora construction system construction filler and a structure thereof.The three-phase flow short-range anaerobic ammonium oxidation and anaerobic ammonium oxidation flora construction system construction filler comprises a filler body, the filler body is made of a porous ceramsite material, a columnar cavity is formed in the center of the filler body, and through type communicating pores are evenly distributed in the side wall of the filler body; the filler realizes comprehensive improvement of mass transfer efficiency, biological activity and engineering applicability through collaborative design of a structure and a material: a three-dimensional flow field remarkably improves the mass transfer coefficient, the ammonia nitrogen removal rate is greatly improved, and the nitrite accumulation rate is kept at a relatively high level; and the nano coating enhances the nitrosobacteria adhesion ability, and effectively prolongs the blocking period in cooperation with rib wire microbubble scouring.

The invention relates to the technical field of adsorption detection, and discloses an imidazolium resin adsorption kinetic parameter online identification method and system.The method comprises the steps that 1, flow, inlet and outlet water concentration, conductivity, temperature and pH value are synchronously collected, and apparent ion strength is obtained through the conductivity; step 2, performing mass balance based on the flow, the inlet and outlet water concentration and the resin dry basis mass to obtain a real-time track of the average adsorption capacity of the resin; step 3, constructing counter-ion coupling isothermal driving force and screening a quasi-balance section; 4, solving isothermal coupling parameters by combining a quasi-balance relational expression; 5, calculating an overall mass transfer coefficient point by point; step 6, simultaneously solving an outer membrane mass transfer proportionality coefficient and an in-hole mass transfer coefficient under two levels of flow; and step 7, constructing a core parameter group and outputting a consistency judgment result identifier. According to the method, online identification and consistency judgment of the adsorption thermodynamic parameters and the mass transfer kinetic parameters of the imidazolium resin are realized.

The invention discloses a method for measuring and distinguishing bubbling flux and diffusion flux of methane released by a water body, which belongs to the field of methane flux measurement in environmental water bodies and comprises the following steps: measuring the gas content of CH4 and N2O in gas generated after the water body at a sampling point and the surrounding atmosphere are oscillated together and in the surrounding atmosphere of the water body at the sampling point; calculating the gas concentrations of CH4 and N2O in the water body when the water body at the sampling point and the surrounding atmosphere are balanced and in the water body at the actual sampling point; measuring the release flux of N2O and the total release flux of CH4 in the water body; calculating and comparing the gas mass transfer coefficients of the diffusion type CH4 and the total CH4; and calculating the CH4 diffusion and bubbling flux. According to the method, N2O is used for calculating the diffusion flux of CH4, rapid distinguishing of bubbling type CH4 and diffusion type CH4 in a water body is achieved, CH4 gas can be collected and measured in a large scale in multiple environments, and the problems that CH4 measurement is prone to being affected by the environment, consumed time is long, and accidental bubbling events are difficult to capture are solved.

The application discloses an inner component, a leaching tower and a removal system, a method for removing small molecular substances in polyglycolic acid, a product and application. The inner component comprises a conical part and a trumpet part; at least part of the wide opening end of the conical part is arranged in the trumpet part, and there is an annular gap between the wide opening end of the conical part and the inner surface of the trumpet part on the same plane as the wide opening end of the conical part; in the generatrix of the conical part, the line connecting the wide opening end and the narrow opening end of the conical part is an arc; in the generatrix of the trumpet part, the line connecting the wide opening end and the narrow opening end of the trumpet part is an arc. The newly developed inner component can improve the liquid-solid two-phase speed in the leaching tower, improve the mass transfer coefficient, and at the same time, the curved surface design can increase the rotating speed of the particles to improve the surface renewal effect of the particles, thereby promoting the leaching effect of the small molecular substances. The method for removing small molecular substances in polyglycolic acid can effectively reduce the small molecular content in PGA.

The invention discloses a method for extracting rubidium through flow pattern regulation and control of a 3D printing microreactor, the microreactor adopts a Venturi structure with a Y-shaped inlet, a gradually-shrinking throat part and a gradually-expanding outlet, and the diameter of a channel is gradually shrunk to 0.6 mm from 1.6 mm and then is gradually expanded to 1.6 mm; dynamic switching of laminar flow, slug flow and multiple strings of small bubble flow is achieved by adjusting the two-phase flow velocity to be 195mu m / min to 2500mu m / min. In a slug flow mode, a TBP-kerosene organic phase and a TBAMBP extraction agent are combined, the pH value of a water phase is 10-14, the five-stage series extraction rate is larger than or equal to 99.34%, the rubidium enrichment multiple is larger than or equal to 50, and the reverse extraction rate is larger than or equal to 95%. According to the method, interface updating is enhanced through the Venturi structure, the slug flow mass transfer coefficient reaches 0.15 s <-1 >, the purity of the product RbCl is larger than or equal to 99.5%, and the method is suitable for efficient recovery of low-concentration rubidium resources and has remarkable economic value in the fields of catalysis, energy and electronic materials.

The present invention provides an improved method for simulating particulate matter based on a high-resolution Earth system model. Based on the high-resolution Earth system model, an aerosol thermodynamics model is coupled into the original aerosol module to achieve the simulation of nitrate aerosols, etc. The calculation parameters of the nitric acid gas mass transfer coefficient are adjusted to reduce the simulation deviation of nitrate aerosols and improve the simulation ability of particulate matter concentration. By coupling and adding an aerosol thermodynamics model into the Earth system model, the physical and chemical mechanisms of the model aerosol are enriched, and the simulation of nitrate aerosols is realized, providing an important tool for studying the global aerosol distribution, changes and environmental effects. Based on the high-resolution Earth system model, the simulation ability of the model for aerosols is improved, the simulation deviation of the model is reduced, and the credibility of air pollution prediction is enhanced. According to the difference in the absorption coefficient of nitric acid gas in mineral dust, the mass transfer coefficient of nitric acid gas with respect to dust particles is adjusted to correct the underestimation of nitrate aerosols by the model.

The invention provides an extraction separation process intelligent simulation optimization method based on digital twinning, which relates to the technical field of chemical process control, and comprises the following steps: establishing a digital twinning model and a numerical calculation model of extraction separation physical equipment, and generating a simulation reference state; acquiring real-time operation data, comparing the real-time operation data with a simulation reference state, identifying a deviation region, adjusting a local mass transfer coefficient, and solving to obtain a correction state field; constructing a coupling matrix of concentration gradient and velocity distribution based on the correction state field, and calibrating a mass transfer dominant flow area through characteristic decomposition; setting a virtual disturbance source in the region to perform multi-working-condition simulation, and screening an optimal disturbance frequency; extracting the distribution variance of the retention time of the tower section, calibrating a flow offset tower section, and calculating the space overlapping degree of the flow offset tower section and the mass transfer dominant flow area; and the aperture ratio of the distributor or the feeding pulsation frequency is selectively adjusted according to the overlapping degree. Accurate simulation and dynamic optimization of the extraction separation process are realized, and the mass transfer efficiency and the separation performance are improved.

The invention belongs to the technical field of lithium ion batteries, and particularly relates to a preparation method and system of lithium sulfide, and the method comprises the following steps: raw material pretreatment: mixing lithium hydroxide powder with an organic solvent according to a certain mass ratio, and stirring in a dissolving kettle to form a suspension; supergravity reaction: feeding the suspension liquid into a rotating filler layer of a supergravity reactor in an axial liquid inlet manner, and introducing preheated hydrogen sulfide gas into the rotating filler layer in a tangential gas inlet manner at the same time for reaction; and product separation: carrying out filter pressing separation on the reaction liquid of the supergravity reactor to obtain a lithium sulfide wet material, washing the lithium sulfide wet material for a plurality of times, and drying the lithium sulfide wet material to obtain lithium sulfide powder. According to the method disclosed by the invention, the mass transfer resistance limitation in the gas-liquid-solid three-phase reaction can be broken through in the lithium sulfide preparation process, the volume mass transfer coefficient of H2S in the liquid phase is remarkably improved, and the purposes of increasing the gas-liquid contact area and shortening the reaction time are achieved.

The invention discloses a woven membrane with an inclination angle, a double-layer woven degassing membrane prepared from the woven membrane and application of the double-layer woven degassing membrane. The woven membrane is formed by weaving a plurality of membrane filaments and weaving yarns, and the weaving direction of the membrane filaments and the weaving direction of the weaving yarns form a non-vertical included angle; the double-layer woven membrane comprises two woven membrane pieces, one woven membrane piece is rotated by 180 degrees in the warp direction and then attached to the other woven membrane piece, and a liquid flow channel with non-parallel wall faces is formed between the two woven membrane pieces. The prepared double-layer woven degassing film can actively enhance fluid disturbance and improve the mass transfer coefficient; according to the membrane type oxygenator prepared by using the degassing membrane, the pre-filling amount can be reduced to an acceptable range of small animals.

The application discloses a gas treatment reactor with a back-mixing inner part and belongs to the technical field of gas treatment equipment. The gas treatment reactor comprises a cylinder, an upper head connected to the upper end of the cylinder and a lower head connected to the lower end of the cylinder, an exhaust pipe is connected to the upper part of the upper head, a liquid discharge pipe is connected to the lower part of the lower head, a liquid inlet pipe is connected to the upper part of the cylinder below the upper head, a gas inlet pipe is connected to the upper part of the cylinder above the lower head, a back-mixing inner part is installed on the inner wall of the cylinder above the gas inlet pipe, and a defoaming mechanism is also installed on the inner wall of the cylinder. The gas treatment reactor provided by the application is internally provided with the back-mixing inner part, a vortex of liquid phase back-mixing is formed when gas and liquid are contacted at the lower part of the reactor, the mass transfer coefficient is increased, the residence time of the gas-liquid two-phase is increased, meanwhile, the device of the application does not need a large number of tower plates and other components, and the transformation from a gas absorption plate-type tower to a new-type reactor is realized.

The application provides a heterogeneous reservoir acid fracturing parameter design method and system, the method constructs an acidification reconstruction geometric model for a reservoir to be reconstructed, introduces required acidification section length and section thickness data to calculate acid liquid flow rates in fractures under different construction discharge capacities in combination with fracture attribute data, further considers acid etching reaction rates and mass transfer coefficients to calculate acid concentrations on inner walls of fractures reacted with a reservoir matrix, determines etching widths of natural fracture walls according to attribute parameters of the reservoir matrix, further calculates reservoir etching volumes corresponding to different construction acid amounts and acid etching fracture widths and lengths, finally decides corresponding acid etching fracture conductivity capacities according to a correction principle of an N-K model, and selects optimal acid injection parameters according to preset optimization conditions. By using the scheme, the problems of small calculation scales and complicated operations in the prior art are effectively overcome, analytical solutions are flexibly used in the calculation process, and an acid injection scheme with optimal acid etching effects and conductivity capacities is accurately and efficiently selected.

Please replace the specification with the attached substitute specification Provided is a manufacturing method for concentrating a predetermined feed solution with a concentrating apparatus and manufacturing a concentrated solution, wherein: the feed solution includes at least a solute, a first solvent and a second solvent; the concentrating apparatus has a concentrating module which concentrates the feed solution via a concentrating membrane; the manufacturing method comprises: inputting target concentrated solution information including a target composition of the concentrated solution; acquiring current concentrated solution information including a current composition of the concentrated solution; acquiring previous concentrated solution information including a previous composition of the concentrated solution; calculating, mass transfer coefficient of the concentrating membrane; calculating, a driving force for the concentrated solution to pass through the concentrating membrane; and calculating, predicted concentrated solution information including composition of the concentrated solution after elapse of a certain period of time.

The invention mainly relates to the technical field of hydrogen energy application, in particular to a simulation calculation method and device for an oxygen mass transfer coefficient in a fuel cell catalyst layer. The invention provides a simulation calculation method for an oxygen mass transfer coefficient in a fuel cell catalytic layer. The simulation calculation method comprises the following steps: establishing a fuel cell numerical model based on an aggregate sub-model; based on the numerical model, constructing an iterative algorithm based on a fuel cell polarization curve; setting an oxygen mass transfer coefficient in the catalyst layer as an initial value within a preset value range, calculating based on an iterative algorithm to obtain a corresponding simulated polarization curve, and comparing the simulated polarization curve with a pre-obtained experimental polarization curve to obtain an error value; and based on the obtained error value as a convergence criterion, updating the value of the oxygen mass transfer coefficient through the iterative algorithm until the error value meets a preset threshold value, and outputting the corresponding oxygen mass transfer coefficient. And efficient and accurate calculation of the mass transfer coefficient of oxygen in the ionomer is realized.

The invention discloses a carbonate rock rough slit H + mass transfer coefficient calculation method based on a power law acid solution. The method comprises the following steps: 1) deriving a mass transfer coefficient calculation method based on a boundary layer theory and a two-dimensional convective diffusion differential equation; and 2) considering and correcting the power law characteristics of the acid liquor, and constructing the H + mass transfer coefficient calculation method.Compared with the prior art, the H + mass transfer coefficient calculation method provided by the invention considers the power law characteristics of the acid liquor, and is more suitable for the actual situation of a field non-Newtonian acid liquor system.